40031223613 has 2 divisors, whose sum is σ = 40031223614. Its totient is φ = 40031223612.

The previous prime is 40031223611. The next prime is 40031223653. The reversal of 40031223613 is 31632213004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39569962084 + 461261529 = 198922^2 + 21477^2 .

It is a cyclic number.

It is not a de Polignac number, because 40031223613 - 2¹ = 40031223611 is a prime.

Together with 40031223611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40031223611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20015611806 + 20015611807.

It is an arithmetic number, because the mean of its divisors is an integer number (20015611807).

Almost surely, 2^40031223613 is an apocalyptic number.

It is an amenable number.

40031223613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40031223613 is an equidigital number, since it uses as much as digits as its factorization.

40031223613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 40031223613 its reverse (31632213004), we get a palindrome (71663436617).

The spelling of 40031223613 in words is "forty billion, thirty-one million, two hundred twenty-three thousand, six hundred thirteen".